To prevent the occurrence of resonance in a vibration control supporting device more surely.

Instead of using the filter factor of an adaptive digital filter as a driving signal, the filter factor is processed through a lowpass filter to generate end driving signals yF and yR, and the driving signals yF and yR generated by the low-pass filter processing are then supplied to active engine mounts 1F and 1R sequentially in synchronization with a sampling clock. The cut-off frequencies of the low-pass filter processing are set such that mass/spring resonance frequencies vibrated in the active engine mounts 1F and 1R to generate forces are shifted to low area sides by amounts equal to the influences of loads applied on the active engine mounts 1F and 1R, and the cut-off frequencies are varied according to the shifting position of an automatic transmission 28.